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ANNUAL 
REPORT 
19 5 5-^6 



,L3j 




LOS A N G 



ANNUAL 
REPORT 
19 5 t )- ')6 




THIS IS AN AREIAL VIEW OF THE MOST POPULAR AREA OF THE ARBORETUM. 

THE FIVE ACRE LASCA LAGOON BISECTS THE LAND WITHIN THE CIRCULAR ROAD. 

JUST LEFT OF CENTER CAN BE SEEN THE TOWER AND STEEPLY PITCHED ROOF OF 
THE "QUEEN ANNE COTTAGE". RECENTLY RESTORED AND FURNISHED, THIS STRUCTURE 
BUILT BY E. J. "LUCKY" BALDWIN IN 1881, IS NOW HISTORICAL LANDMARK #367 OF 
THE STATE OF CALIFORNIA. 

TO THE SOUTHWEST, STANDING QUITE CLOSE TO THE ROAD, IS THE COACH BARN. 
THE CARRIAGES AND RACE HORSES OF "LUCKY' S" OCCUPIED THIS STRUCTURE. THE 
INTERIOR OF THE BARN IS FINISHED IN REDWOOD AND CEDAR PANELING. 

ON A LINE WITH THE COACH BARN, BUT TO THE EAST, IS THE REID ADOBE HOUSE. 
THIS BUILDING WAS ERECTED ON RANCHO SANTA ANITA BY ITS FIRST OWNER, HUGO 
REID, IN 1839. 



IN THE FOREGROUND, THE DENSE VEGETATION ON THE NORTH SHORE OF THE LAGOON 
IS THE JUNGLE. A MOST POPULAR TOUR FOR CHILDREN AND ADULTS ALIKE, THIS AREA 
IS A NATURAL TANGLE OF WILD GRAPEVINES, HONEYSUCKLE, FALLEN TREES, ORCHIDS, 
GINGER, PALMS BAMBOO AND WILLOWS. 



Los Angeles sees' Arboretum 

301 No. Baldwin Avenue, Arcadia, California 



Honorable Board of Supervisors, 

County of Los Angeles, 

501 Hall of Records, 

Los Angeles 12, California. 

Gentlemen: 

On behalf of the staff of the Los Angeles State 
and County Arboretum, it is my privilege to submit the 
third Annual Report. This summarizes our accomplishments 
for the fiscal year 1955-56. 

During this period development of the grounds 
has continued at full scale. The research program reach- 
ed about 25$ of its ultimate scope while the educational 
program, just initiated in the spring of 1956, operated 
at about 10$ of its planned final capacity. It is expect- 
ed development of the Arboretum, at Arcadia, will continue 
at 100$ for several years while the educational and re- 
search program will gradually increase. Then as develop- 
ment of the grounds reduces to about a 20$ level the re- 
search and education program will be at peak operation. 
At this time the maximum value of the Arboretum to the 
community will be realized. 

While the future promises much, the valuable con- 
tributions of the Arboretum which have already been achiev- 
ed are presented in this report for your review. 



Respectfully submitted, f 
William S. Stewart, 



LOS ANGELES COUNTY 



DEPARTMENT OF ARBORETA AND BOTANIC GARDENS 



BOARD OF SUPERVISORS 



KENNETH HAHN 



BURTON W. CHACE 



4TH DISTRICT 



ROGER U. JESSUP 



ARTHUR J. WILL, CHIEF ADMINISTRATIVE OFFICER 



LOS ANGELES COUNTY 
DEPARTMENT OF ARBORETA AND BOTANIC GARDENS 

BOARD OF GOVERNORS 



FRITS W. WENT, PRESIDENT 

RALPH D. CORNELL, 1ST VICE PRESIDENT 

MRS. JOHN R. MAGE, 2ND VICE PRESIDENT 

GEORGE H. SPALDING, SECRETARY 

SAMUEL AYRES, JR. 

VARNEY BANCROFT 

MRS. HARRY J. BAUER 

ROBERT CASAMAJOR 

MRS. HAROLD CROZIER 

MRS. RICHARD Y. DAK IN 

MRS. IVEY DARBY 

J. D. FUNK 

WILLIAM HERTRICH 

LIONEL LOUIS HOFFMANN 
HENRY ISHIDA 

CHARLES S. JONES 

HOWARD A. MILLER 

SAMUEL B. MOSHER 

MRS. RUDOLPH J. RICHARDS 
F. HAROLD ROACH 

MRS. WILLIAM S. SHEARER 
PAUL S. SMITH 

HENRY C. SOTO 

MRS. EUNICE SPRINGER 



TABLE OF CONTENTS 

WHAT IS AN ARBORETUM 

LOCATION 

ORGANIZATIONAL CHART 

CALIFORNIA ARBORETUM FOUNDATION, INC 

INTRODUCING OUR NEW DIRECTOR 

CAPITAL IMPROVEMENTS 

ARBORETUM TOURS 

HORTICULTURE 

PLANT PROPAGATION 

PLANT AND WEATHER RECORDS 



ARBORETUM LIBRARY 



SPECIAL EVENTS 



PUBLIC RELATIONS 38 

GOOD-BY 39 



WHAT IS AN ARBORETUM 



the u r: and county arboretum fulfills this definition. 

I" ADDITION, WITHIN ITS 127 ACRES CAN BE FOUND III ICNS rp 

EARLY CALIFORNIA RANCHC LIFE. 

FOR INSTANCE, THERE IS A CONDUCTED JEEP TRAIN TOUR OF THE GROUNDS, 
WHICH IS INSTRUCTIVE AND ENTERTAINING. THE PLANTS BEING ACCURATELY 
LABELED, A WALKING TOUR IS BOTANICALLY ENLIGHTENING. ORGANIZED CLASSES 
IN BOTANY AND HORTICULTURE ARE DEVELOPING. A VARIETY OF DEMONSTRATION 
GARDENS ARE TO BE SEEN FROM WHICH TO TAKE IDEAS HOME AND PLANT THEM. 
COUNSULTATICN IS AVAILABLE CONCERNING PLANT PROBLEMS AND PLANT IDENTIFI- 
CATION. 



THERE IS PLANT INTRODUCTION AND TESTING RESEARCH. NEW HORTICULTURAL 
VARIETIES FROM WORLD WIDE SOURCES ARE BEING PLANTED • HERE . IT IS THE 
HOPE THAT SOMETHING NEW IN FLOWER, COLOR, FRUIT OR FORM OF PLANT WILL BE 
ADDED, FROM TIME TO TIME, TO THE LANDSCAPING OF SOUTHERN CALIFORNIA HOMES 
ANT) CIVIC PLANTINGS. 

THERE IS TURFGRASS RESEARCH. FERTILIZERS, WEED KILLERS, FUNGICIDES, 
SOIL STERILANTS AND OF COURSE, GRASS SPECIES COME UNDER THIS PROGRAM. 
AGAIN, THE OBJECTIVE IS TO PROVIDE USEFUL INFORMATION CONCERNING PRACTICAL 
APPLICATION OF THESE MATERIALS FOR THE HOME OWNER. 

THERE IS COOPERATIVE RESEARCH WITH AGENCIES OUTSIDE THE ARBORETUM. AN 
EROSION CONTROLLING AND FIRE RESISTANT PLANT HUNT IS IN PROGRESS WITH THE 
UNITED STATES FOREST SERVICE. AT PRESENT, THE ROCK ROSE ( CISTUS ) APFEARS 
TO BE A PROMISING PLANT FOR THIS WORK. ANOTHER PROJECT IS CURRENTLY UNDER 
WAY WITH THE LOS ANGELES AIR POLLUTION CONTROL DISTRICT. 

AN ARBORETUM THEN CONCERNS ITSELF WITH PLANT INTRODUCTIONS, PLANT TEST- 
ING, PLANT RESEARCH AND PLANT EDUCATION. ITS ULTIMATE GOAL IS SERVICE TO 
ITS IMMEDIATE GEOGRAPHICAL AREA THROUGH IMPROVEMENT IN THE HORTICULTURAL 
PURSUITS OF THAT AREA. 

A STRONG IMPETUS IS GIVEN TO AN ARBORETUM IN SOUTHERN CALIFORNIA BY 
THE NEARLY YEAR AROUND GARDENING CONDITIONS AND A PROJECTED POPULATION IN 
TEN YEARS OF 10,000,000 WITHIN THE COUNTY OF LOS ANGELES. 



THE ARBORETUM IS LOCATED IN THE CITY OF ARCADIA A FEW MILES EAST OF 
PASADENA AND LESS THAN A 40 MINUTE DRIVE BY CAR FROM THE LOS ANGELES 
CIVIC CENTER. THE MAIN ENTRANCE AND PARKING AREAS ARE FOUR BLOCKS SOUTH 
OF COLORADO BOULEVARD AT 301 NORTH BALDWIN AVENUE. 



TO PASADENA 



FOOTHILL BLVD. 



I^nngnn. t 




Department o^Arqorgta ^Botanic Gardens 




( Park Halnt.Man Hlpr (l) 



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.Int.llui mprTTTI I >rbor«tu. o.rd.n.i- ())~ | [ 



CALIFORNIA ARBORETUM FOUNDATION, INC. 



THE CALIFORNIA ARBORETUM FOUNDATION IS A NON-PROFIT ORGANIZATION INCOR- 
PORATED UNDER THE LAWS OF CALIFORNIA ON FEBRUARY 20, 1948 BY A GROUP OF 
CIVIC-MINDED MEN AND WOMEN INTERESTED IN THE ESTABLISHMENT OF A HORTICULTURAL 
CENTER WHICH BECAME THE LOS ANGELES STATE AND COUNTY ARBORETUM. SINCE JULY 1, 
1953, UNDER AGREEMENT WITH THE COUNTY BOARD OF SUPERVISORS, THE ARBORETUM IS 
BEING OPERATED, MAINTAINED AND FURTHER DEVELOPED BY THE DEPARTMENT OF ARBORETA 
AND BOTANIC GARDENS OF LOS ANGELES COUNTY. 

THE FOUNDATION, AS OF JULY 1, 1953, HAS THE FUNCTION OF CONDUCTING FOR 
PUBLIC BENEFIT ANY SPECIAL HISTORICAL, HORTICULTURAL, RESEARCH AND EDUCA- 
TIONAL ARBORETUM PROJECTS FOR WHICH PUBLIC TAXES ARE NOT AVAILABLE. A 
MAJOR ACHIEVEMENT OF THE FOUNDATION, THROUGH THE HISTORICAL COMMITTEE, HAS 
BEEN THE RESTORATION OF THE "QUEEN ANNE COTTAGE" , SOLELY THROUGH PRIVATE 
FINANCING. ALSO, THE HERB GARDEN, A FASCINATING PUCE, WHICH HAS BEEN 
FINANCED BY THE SOUTHERN CALIFORNIA UNIT OF THE HERB SOCIETY OF AMERICA. 

SOME OF THE PROPOSED OBJECTIVES ARE: AN ORCHID HOUSE OF FIVE UNITS FOR 
PROPAGATION AND DISPLAY, ONE OF WHICH IS NOW UNDER CONSTRUCTION, THANKS TO 
A GENEROUS BENEFACTOR; COLLECTION OF RARE HORTICULTURAL BOOKS FOR THE LIBRARY; 
FOUNDATION OWNED JEEP TRAINS TO REPLACE THOSE NOW RENTED BY THE FOUNDATION; 
AND LAST BUT VERY IMPORTANT, A FRAGRANCE GARDEN FOR THE BLIND ADJACENT TO 
A MEDICINAL PLANT GARDEN. 

THE FOUNDATION IS ORGANIZED TO OFFER MEMBERSHIPS OF VARYING CLASSIFI- 
CATIONS TO INDIVIDUALS, GARDEN CLUBS, PLANT SOCIETIES, AND OTHER SPONSORED 
GROUPS AND ORGANIZATIONS INTERESTED IN THE ARBORETUM ACTIVITIES. 

THE FOUNDATION PUBLISHES JOINTLY WITH THE SOUTHERN CALIFORNIA HORTI- 
CULTURAL INSTITUTE A QUARTERLY JOURNAL LASCA LEAVES . DEVOTED TO HORTICULTURAL 
SUBJECTS OF SPECIAL INTEREST TO SOUTHERN CALIFORNIANS. 

THE FOUNDATION RECEIVES CONTRIBUTIONS, GRANTS, BEQUESTS AND DONATIONS 
TOWARD ITS SPECIAL PROJECTS. ALL CONTRIBUTIONS ARE DEDUCTIBLE UNDER FEDERAL 
INCOME TAX LAWS. 

FOUNDATION MEMBERSHIP OFFERS PARTICIPATION IN A POTENTIALLY GREAT HORTI- 
CULTURAL PROGRAM FOR PRESENT AND FUTURE GENERATIONS. SITUATED IN AN UNIQUELY 
FAVORABLE CLIMATIC AREA, THE ARBORETUM PROVIDES AN UNUSUAL SETTING FOR 
SPIRITUAL BEAUTY AND PEACE. 

ALL MEMBERSHIPS INCLUDE THE QUARTERLY PUBLICATION LASCA T.FAVES THE 
PERIODIC NEWS REPORT OF ARBORETUM ACTIVITIES THROUGH LASCA NEWS . AND THE 
CHOICE OF CERTAIN SURPLUS SEEDS DISTRIBUTED IN JANUARY, AND~PLANT DISTRIBU- 
TION AT THE ANNUAL MEETING IN THE SUMMER. 



CALIFORNIA ARBORETUM FOUNDATION, INC. 



FRITS W. WENT, PRESIDENT 

RALPH D. CORNELL, VICE PRESIDENT 

MRS. JOHN R. MAGE, VICE PRESIDENT 

HOWARD A. MILLER, TREASURER 

GEORGE H. SPALDING, SECRETARY 

MRS. LEE WRAY TURNER, EXECUTIVE SECRETARY 



SAMUEL AYRES, JR. 
MRS. HARRY J. BAUER 
ROBERT CASAMAJOR 
MRS. RICHARD Y. DAKIN 
JOHN ANSON FORD 
J. D. FUNK 
WILLIAM HERTRICH 
LIONEL LOUIS HOFFMANN 
CHARLES A. JONES 



JOHN C. MACFARLAND 

SAMUEL MOSHER 

STUART O'MELVENY 

MRS. RUDLOPH J. RICHARDS 

HAROLD F. ROACH 

MRS. WILLIAM D. 

HENRY C. SOTO 

LOVELL SWISHER 

FRANK TITUS 



HONORARY TRUSTEES 



PRESIDENT, MEN'S GARDEN CLUB OF LOS ANGELES 

PRESIDENT, CALIFORNIA GARDEN CLUBS, INC. 

PRESIDENT, SOUTHERN CALIFORNIA HORTICULTURAL INSTITUTE 

CHAIRMAN, CALIFORNIA INTERNATIONAL FLOWER SHOW 



CALIFORNIA ARBORETUM FOUNDATION, INC. 

BOARD OF COUNCILORS 

"THERE SHALL BE A BOARD OF COUNCILORS NOT TO EXCEED FIFTY (50) IN NUM- 
BER, APPOINTED BY THE BOARD OF TRUSTEES. THE DUTIES OF COUNCILORS AS A 
BOARD OR AS INDIVIDUALS SHALL BE TO AID IN THE AFFAIRS OF THE FOUNDATION AS 
REQUIRED BY THE BOARD OF TRUSTEES. A COUNCILOR SHALL SERVE FOR A TERM OF 
THREE YEARS UNLESS REAPPOINTED. ALL COUNCILORS MUST BECOME MEMBERS OF 
CALIFORNIA ARBORETUM FOUNDATION, UNLESS WAIVED IN ANY PARTICULAR CASE BY A 
MAJORITY VOTE OF THE BOARD " 



JOHN E. BARBER 

DAVID BARRY, JR. 

DR. & MRS. ELMER BELT 

MRS. FRED HATHAWAY BIXBY 

MRS. ROSS K. BOORE 

LEO CARRILLO 

RICHARD A. CARRINGTON 

NORMAN CHANDLER 

MRS. HOWARD CUNNINGHAM 

F. WESLEY DAVIES 

MISS NEVA DOUGLAS 



MRS. GARRETTSON DULIN 
HUGH EVANS 



EARLE E. HUMPHRIES 
ALEXANDER KING 



WALTER H. LEIMERT 



GUY R. MCCOMB 

MR. & MRS. ELMORE MENNINGER 

MANFRED MEYBERG 

MORRIS B. MILLER 

MRS. WILLIAM WARREN ORCUTT 

MRS. CHARLES W. PADDOCK 

W. DAN QUATTLEBAUM 

MRS. HARRY W. ROBINSON 

W. S. ROSECRANS 

WILLIAM H. SCHUCHARDT 

DR. LEROY B. SHERRY 

COLIN C. SIMPSON 

MRS. FORREST Q. STANTON 

ROBERT STRUB 

DR. FRANS VERDOORN 

DR. RUFUS B. VON KLEINSMID 

MISS ABIGAIL VON SCHLEGELL 

MRS. IRVING WALKER 

MRS. ARCHIBALD B. YOUNG 




INTRODUCING OUR NEW DIRECTOR. 



DR. WILLIAM S. STEWART, CHAIRMAN OF THE 
CITRUS EXPERIMENT STATION 1 S DEPARTMENT OF HORTI- 
CULTURE, ON JULY 12TH ACCEPTED THE POSITION OF 
DIRECTOR OF THE LOS ANGELES STATE AND COUNTY 
ARBORETUM, ARCADIA, AND HEAD OF THE DEPARTMENT 
OF ARBORETA AND BOTANICAL GARDENS IN LOS 
ANGELES COUNTY. HE SUCCEEDS DR. RUSSELL J. 






STEWART ASSUMED HIS NEW DUTIES IN 
AS DIRECTOR OF THE ARBORETUM, 
OPERATED SINCE 1953 BY LOS ANGELES COUNTY. 

IN ADDITION TO CONTINUING THE ESTABLISHED 
PROGRAM OF DEVELOPING NEW ORNAMENTAL PLANTS 
SUITABLE TO CULTURE IN SOUTHERN CALIFORNIA, IN- 
CLUDING THIRTEEN COUNTIES, DR. STEWART STATES 
THAT HE PLANS TO ACCELERATE A RESEARCH PROGRAM 
FOR THE "BACKYARD GARDENER", WHO HE POINTS OUT IS ASSUMING AN INCREASINGLY 
IMPORTANT ROLE IN AMERICAN LIFE. FURTHER, THE APPOINTMENT AS DIRECTOR IS 
PLANNED TO INCLUDE A RESEARCH ASSOCIATE APPOINTMENT AT CALIFORNIA INSTITUTE 
OF TECHNOLOGY WITH USE OF THE EXTENSIVE RESEARCH FACILITIES ON THE PASADENA 
CAMPUS. 

HE WAS BORN IN SAN DIEGO AND WAS GRADUATED FROM BEVERLY HILLS HIGH 
SCHOOL. DR. STEWART HOLDS TWO DEGREES FROM U.C.L.A. AND WAS AWARDED A 
PH.D. IN PLANT PHYSIOLOGY AT CALIFORNIA INSTITUTE OF TECHNOLOGY IN 1939. 

PRIOR TO JOINING THE CITRUS EXPERIMENT STATION STAFF IN 1945, HE SERVED 
WITH THE U.S.D.A. BUREAU OF PLANT INDUSTRY AND DURING WORLD WAR II WAS AS- 
SIGNED TO EMERGENCY INVESTIGATIONS ON RUBBER PRODUCTION IN MEXICO. 

HE LEFT THE RIVERSIDE CAMPUS IN 1950 TO SPEND THREE YEARS WITH THE PINE- 
APPLE RESEARCH INSTITUTE IN HAWAII, WHERE HE WAS HEAD OF THE PLANT PHYSIOLOGY 



HE RETURNED TO RIVERSIDE IN 1953 TO ASSUME CHAIRMANSHIP OF THE DEPART- 
MENT OF ORCHARD MANAGEMENT AT THE CITRUS EXPERIMENT STATION. SOON THERE- 
AFTER HE BECAME CHAIRMAN OF THE DEPARTMENT OF HORTICULTURE, WHICH WAS FORMED 
BY COMBINING THE DEPARTMENTS OF ORCHARD MANAGEMENT AND PLANT BREEDING. 

DR. STEWART HAS ALSO HEADED THE STATION COMMITTEE ON ORCHARD REJUVENA- 
TION, WHICH IS CONDUCTING A COMPREHENSIVE STUDY OF THE CAUSES OF DECREAS- 
ING ORANGE SIZE AND YIELDS IN SOUTHERN CALIFORNIA. HE HAS CONTINUED HIS 
RESEARCH THAT LED TO THE WIDESPREAD USE OF 2,4-D AND OTHER PLANT GROWTH 
REGULATORS ON CITRUS. 

SKIING AND HIKING ARE THE CHIEF HOBBIES OF THE STEWART FAMILY WHICH IN 
ADDITION TO MRS. STEWART INCLUDES MARY LEE 10, DAVID 9, CAROL ANN 4. 



CAPITAL IMPROVEMENTS 



ADMINISTRATION BUILDING AND GATEHOUSE 



A MILESTONE IN THE DEVELOPMENT OF THE ARBORETUM WAS PASSED WHEN CON- 
STRUCTION OF THE ADMINISTRATION BUILDING AND GATEHOUSE WAS BEGUN IN 




CONSTRUCTION OF THE ADMINISTRATION BUILDING MARCH, 1956. 
THE GATEHOUSE TAKING FORM IN BACKGROUND. 



DANIEL BROTHERS CONSTRUCTION COMPANY OF PASADENA WERE THE LOW BIDDERS 
AT $198,496 AND WERE AWARDED THE CONTRACT BY THE LOS ANGELES COUNTY SUPER- 
VISORS. PLANS WERE PREPARED BY ARCHITECTS ALLISON AND RIBLE OF LOS ANGELES. 
CONSTRUCTION IS TO BE OF PAINTED CONCRETE BLOCK WALLS, CONCRETE FLOOR AND 
COMPOSITION AND GRAVEL ROOF. 

FROM BALDWIN AVENUE, THE ADMINISTRATION BUILDING WILL BE APPROACHED BY 
THREE TIERS OF BROAD CONCRETE STEPS LEADING UP TO AN ENTRANCE PAVILION AND 
WAITING ROOM. HERE WILL BE ILLUMINATED WALL DISPLAY CASES AND A CENTER 
PLANT DISPLAY CASE. FROM THIS ENTRANCE, A CORRIDOR RUNS THE LENGTH OF THE 
BUILDING WITH THE VARIOUS OFFICES OPENING ONTO THE HALLWAY. JUST INSIDE 
THE MAIN DOOR AND TO THE LEFT, IS THE RECEPTION OFFICE AND TELEPHONE EX- 
CHANGE. THIS ADJOINS THE BUSINESS OFFICE WHICH TEMPORARILY WILL BE USED TO 
HOUSE THE LIBRARY. CONTINUING DOWN THE CORRIDOR ALONG THE NORTH SIDE OF 
THE BUILDING, OFFICES ARE LOCATED FOR THE BUSINESS MANAGER, SUPERINTENDENT 



SECRETARY AND DIRECTOR. ON THE SOUTH SIDE OF THE BUILDING, THE FIRST 
OFFICE WILL BE FOR THE EXECUTIVE SECRETARY OF THE ARBORETUM FOUNDATION^ 
THEN IN SUCCESSION IS THE RESEARCH OFFICE WITH A PHOTOGRAPHIC DARKROOM 
AND SMALL LABORATORY, AND THE TAXONOMT OFFICE. THERE IS ALSO A BASEMENT 
TO HOUSE HEATING, MECHANICAL EQUIPMENT AND TO PROVIDE SOME LIMITED 
STORAGE AREA. 



AN IMPORTANT FEATURE OF THE BUILDING WILL BE THE CONFERENCE ROOM AND 
MEETING GARDEN AT THE EAST END. THIS ROOM, ABOUT 20 X 40 FEET IN SIZE, 
OPENS BY SLIDING DOORS ONTO A WALLED PATIO GARDEN WITH COLORED CEMENT TILE 
FLOOR. THE CONFERENCE ROOM AND MEETING GARDEN WILL PROVIDE SPACE FOR 
GARDENING AND BOTANY CLASSES OF LIMITED SIZE AND FOR LECTURES AND STAFF 
MEETINGS. IT ALSO WILL BE AVAILABLE TO GARDEN CLUBS AND PLAHT SOCIETIES 
FOR MEETINGS AND PLANT FORUMS. THE MEETING GARDEN OPENS TO THE OUTSIDE BY 
A GRILLE GATE LEADING TO A CONCRETE RAMP SLOPING GENTLY DOWN TO THE STREET 
LEVEL WHERE THERE IS AMPLE PARKING. 

THE SECOND UNIT NOW UNDER CONSTRUCTION IS THE GATEHOUSE WHICH HAS A 
TOUR ASSEMBLY AREA AND WALK LEADING TO THE JEEP TRAIN STATION. FEATURES 
OF THE GATEHOUSE INCLUDE A PUBLIC INFORMATION OFFICE, A NATURALIST-GUIDE 
OFFICE AND ENTRANCE TURNSTILES. THE INFORMATION OFFICE WILL HAVE TWO 
INFORMATION WICKETS, A COUNTER AND IS SO ARRANGED THAT POST CARDS, BULLE- 
TINS AND BOOKS CONCERNING THE ARBORETUM, GARDENING, AND HORTICULTURE CAN 
BE SOLD. INSIDE THE GATE WILL BE A COVERED TOUR ASSEMBLY AREA WITH WOODEN 
BENCHES AND AN ATTRACTIVELY FILLED PLANTER. 



COMPLETED IN THE FALL OF 1956 





^v-vTO^LLO' 

AND THOSE TCTBE GROWN, CONC1 
PATTERN THROUGHOUT THE ARBpJ 
WORKING IN COOPERA' 



-\ 



;nce mapping OF (all OF the existing plants, 

- MARKERS WERE INSTALLED ON A^OO FOOT GRID 



_ TUM GROUNDS^ THE GARDENER FOR EACH).SEC 
ERATION^ITg/THE PLANT RECORDER AND TAXONOMIST, WILL) 
THE PLANTS ON^CORRESPONDJNG MAPS SO THAT EVEN^F TI 



ACCURATE RECORDS WIL^BE MAINTAINED 



SECTION, 
AND TAXONOMIST, WILL, LOCATE 
FIELD LABELS ARE LOST, 





- 6 ! 0- 5 


^—6 j P-5 



TOURS 

THE GUIDED TOUR OF THE ARBORETUM USUALLY REQUIRES AN HOUR AND FIFTEEN 
MINUTES. IT IS A COMBINATION OF A "JEEP TRAIN" TRIP THROUGH THE PLANT 
INTRODUCTIONS OF SHRUBS AND TREES FROM ALL OVER THE WORLD (ARRANGED ACCORD- 
ING TO GEOGRAPHIC AREAS) AND A WALKING TOUR THROUGH THE HISTORICAL SECTION 
OF THE ARBORETUM. IN THE HISTORICAL AREA CAN BE SEEN THE LAGOON WHICH 
FURNISHED WATER TO THE INDIANS; THE OLD ADOBE HOUSE OF THE EARLY (1839) 
SCOTCH PAISANO, HUGO REID AND HIS INDIAN WIFE, VICTORIA; E. J. "LUCKY" 
BALDWIN'S "QUEEN ANNE COTTAGE" AND CARRIAGE HOUSE ~ ALL SET AMID THE BEAUTY 
OF TOWERING TREES, SOME OF THEM OVER A HUNDRED YEARS OLD. AFTER INSPECTING 
THESE MDNUMENTS OF THE PAST WE MAY FOLLOW A JUNGLE TRAIL AT THE END OF WHICH 
OUR "JEEP TRAIN" WILL BE WAITING TO RETURN US TO THE ENTRANCE. THE NATURAL- 
IST GUIDE IS GLAD TO ANSWER QUESTIONS AT THE END OF THE TOUR. 



THE NATURALIST GUIDE IS TELLING HIS GROUP 
OF SCHOOL CHILDREN THAT THE WILLIAM WOLFSKILL 
EUCALYPTUS (E. GLOBULUS ) WAS PLANTED IN 1865 
AND TODAY IS 185 FEET TALL. THIS TREE, ONE 
OF THE TALLEST OF ITS KIND IN SOUTHERN CALI- 
FORNIA, STANDS AT THE ENTRANCE TO THE "QUEEN 
ANNE COTTAGE". 





y 4 



•i 



DAILY TOURS FOR SCHOOLS 



CONDUCTED TOURS BY ARBORETUM NATURALISTS FOR EDUCATIONAL EXPERIENCE IN 
BOTANY, NATURE STUDY AND EARLY CALIFORNIA HISTORY AT THE LOS ANGELES STATE 
AND COUNTY ARBORETUM. 



OBJECTIVES OF SUCH A FIELD TRIP. 



B. TO SEE AND LEARN SOMETHING OF EARLY CALIFORNIA HISTORY IN THE 
FORM OF BUILDINGS, CONSTRUCTION MATERIALS, FURNISHINGS, AND 
HORTICULTURE. 

C. TO LEARN THE NATURE AND OBJECTIVES OF AN ARBORETUM. 
THE LEARNING EXPERIENCE. 

A. THE TRIP TO AND FROM THE ARBORETUM. 



D. TO LEARN SOMETHING ABOUT PLANTS THROUGH TOUCH AND SMELL. 

E. TO SEE HOW A PUNT IS CULTIVATED FROM SEED TO MATURITY. 

F. TO EXPERIENCE THE CONTRIBUTION OF PLANTS TO CULTURE THROUGH 
FORM, COLOR, AND GROUPING. 

G. TO REALIZE THAT WE HAVE A VERY REAL AND VALUABLE HERITAGE 
FROM THE DAYS OF THE EARLY CALIFORNIA PIONEERS AND THAT WE 
MAY CONTINUE TO GUARD AND ADD OUR SHARE TO THIS HERITAGE. 

III. AREAS OF LEARNING. 

A. PLANTS F. GEOLOGY 

B. PLANT PROPAGATION G. BIRDS 

C. PLANT IDENTIFICATION H. CALIFORNIA HISTORY 

D. PLANT ASSOCIATIONS I. HORTICULTURAL EXPERIMENTATION 

E. CONSTRUCTION OF GARDENS J. JEEP TRAIN TOUR 



TOUR STATISTICS 



OJ OJ 



YOUTH TOURS 



THE FUTURE OF A CULTURE ! 
ON YOUTH. THIS IS ESPECIALLY TRUE 
IN THE WORLD OF PLANTS, WHERE IT 
REQUIRES ONE MAN»S LIFE TIME TO 
ACCOMPLISH A SMALL MEASURE OF PRO- 
GRESS. IT IS THE ARBORETUM 1 S DESIRE 
THAT AN INCREASING NUMHER OF CHILDREN 
WILL COME AND LEARN ABOUT PLANTS AND 
PLANT APPRECIATION EACH YEAR. 







**4 WO OPEMAKr 


.•/7/V, 


9. /9SS- 


7000 
ft SOOO 




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s. SOOO 






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JAN. FE0. M4R. AP%. A14Y. JO/V, Jul-, 




THIS YEAR EXCELLENT PROGRESS WAS 
MADE IN THE OVER-ALL DEVELOPMENT 
OF THE ARBORETUM 1 S PLANTINGS. A 
LARGE MEASURE OF CREDIT FOR THIS 
PROGRESS IS DUE THE CHIEF HORTI- 
CULTURIST ANT) TO THE ACTIVE IN- 
TEREST OF THE ARBORETUM GARDENERS 
IN CHARGE OF THE VARIOUS SECTIONS. 



STURT PEA , ( CLIANTHUS 3PECICSUG ) A 
VINE, WITH as, FOUND 

CM THE SAND DESERTS OF AUSTRALIA. 



TION: IN THIS SECTION, THE EUCALYPTUS COLLECTION PASSED 
THE 300 SPECIES HARK. ACACIA SPECIES NOW NUMBER 
200. THE PLANTING OF THE KANGAROO PAWS (ANIGOZANTHOS) IS EXCEPTIONAL AND 
ATTRACTS MUCH COMMENT FROM VISITORS. 



THE JUNGLE ; WORK CONTINUES IN 
THIS SECTION WITH 
ADDITIONS TO THE EPIPHYTE PLANT 
GROUPING. THESE PLANTS, GROWING 
ON TREES, ARE LARGELY RESPONSIBLE 
FOR THE OVER-HEAD COLOR. MORE 
THAN 359 ORCHID AND BROMELIADS 
WILL BE PLANTED FOR THEIR COLOR 
CONTRIBUTIONS TO THIS SCENE. 




NGAROO PAW, ( ANIGOZANTHOS 
ALIA WITH 
RED STEMS AND GREEN FLOUERS. 



SOUTH AFRICA ; EARLY IN THE YEAR, THE 

DAISY FAMILY, (COMPCSITAE) 
GROWING IN THE SOUTH AFRICAN SECTION 
WERE PLAGUED BY FUSARIUM FUNGUS. 
THIS FUNGUS KILLS PLANTS BY INFECTING 
THE ROOTS AND STEM. CONTROL OF FUSARIUM 
HAS EVENTUALLY ESTABLISHED AND EXTEN- 
SIVE PLANTING WAS THEN CARRIED OUT DUR- 
ING THE REMAINDER OF THE YEAR. THE 
COLLECTIONS SO FAR IN THIS AREA REPRE- 
SENT SOME OF THE FINEST SPEC BENS OF 
SOUTH AFRICAN FLORA TO BE FOUND ANY- 
WHERE ON THE WEST COAST. 




PURPLE HOP BUSH 
( DCDGNASA VISCC3A PURPUREA ) , 
A REDDISH-PURPLE LEAVED SHRUB 
FROM SOUTH AFRICA. 



TO THE SOUTH-WEST ACROSS THE ROAD FROM SOUTH AFRICA, IS THE 
SOUTH AMERICAN SECTION. NEW PLANTINGS HERE HAVE BEEN 

LIMITED THIS YEAR BY THE CONSTRUCTION OF THE FLOOD CONTROL DRAINAGE CHANNEL 

WHICH BISECTS THIS AREA. 



DOMESTIC LANDSCAPE : 




THIS SECTION IS RAPIDLY REACHING MATURITY. IT IS NOW 
POSSIBLE TO SEE NEARLY MATURE SPECIMENS OF GROUND 
COVERS. THE ARBORETUM'S 
COLLECTION OF PHILADELPHUS 
AND DEUTZIA ARE PLANTED IN THIS 
SECTION. THEY ARE OUTSTANDING 
FOR THEIR SPRING COLOR. 



A HANDSOME MEMBER OF THE 
CONIFER FAMILY IS PINUS 
OOCARPA . A NATIVE OF MEXICO 
AND CENTRAL AMERICA, THIS 
TREE WITH PENDULOUS, LIGHT 
GREEN NEEDLES MAY BE SEEN IN 
THE DOMESTIC LANDSCAPE SECTION. 




HERB GARDEN : ONCE AGAIN, THE HERB 

GARDEN IS OUTSTANDING 
FOR PROGRESS. THE CONTINUING CO- 
OPERATION AND INTEREST OF THE MEM- 
BERS OF THE SOUTHERN CALIFORNIA UNIT 
OF THE HERB SOCIETY OF AMERICA IS A 
SOURCE OF NEVER ENDING PLEASURE TO 
ALL. PRESENT PLANS CALL FOR COM- 
PLETION OF THIS GARDEN DURING THE 
COMING YEAR. 



BALDWIN AVENUE ESPLANADE : ONE OF THE MOST EYE CATCHING PLANTINGS IN THE 

SAN GABRIEL VALLEY DURING MAY AND JUNE IS FOUND 
ALONG BOTH SIDES OF THE ARBORETUM'S BALDWIN AVENUE ESPLANADE. IT IS A 
DAZZLING DISPLAY OF A PINK, ROSE AND WHITE CARPET OF ICE PLANT (LAMPRANTHUS 
SIMILAR TO ME3EMBRYANTHEMUM ) . THESE PLANTINGS ARE BEING EXTENDED TO FORM 
A SOLID RIBBON OF COLOR, MORE THAN 1000 FEET LONG, FROM COLORADO BOULEVARD 
SOUTH TO THE MAIN ENTRANCE OF THE ARBORETUM. CALIFORNIA LILACS (CEANOTHUS) 
AND VARIOUS STECIES OF BOTTLEBRUSHES PLANTED BEHIND THIS BORDER, ADD MORE 
COLOR TO THIS DISPLAY. 




CENTER: BALDWIN AVENUE. BORDER: CLOSE VIEW OF ICE PLANT FLO! 



HISTORICAL SECTION : THE OLD FASHIONED ROSE GARDEN HAS BEEN STARTED WITH 

THE GENERAL OUTLINE ESTABLISHED AND A FEW OLD ROSE 
VARIETIES PLANTED. FURTHER DEVELOPMENT WILL DEPEND ON PRIVATE FUNDS AND 
THE INTEREST OF ROSE SPECIALIST GROUPS. 



DISPLAY GARDEN ; THE MOST RECENT SECTION, A TEST AND DISPLAY GARDEN, WAS 

INITIATED THIS SPRING. COLOR HERE IS ALREADY IN EVIDENCE 
AND THE FLOWERING OF SEVERAL HUNDRED NAMED GERANIUM SELECTIONS OF VARIED 
COLORS, WILL SOON BE ENJOYED. IN THE FALL, M3RE THAN A 1000 CHRYSANTHEMUMS 
WILL BRING A BLAZE OF BRILLIANCE TO THIS AREA. THE BEDS CONTAINING THESE 
PERENNIALS ARE ARRANGED FOR CONVENIENT VIEWING. THE IDENTIFYING LABELS 
ARE READILY ACCESSIBLE FROM THE FOOTPATHS. 



THE ANNUAL GROWTH OF ESTABLISHED PLAWTUKJS GIVES THE ARBORETUM THE 
LOOK AND FEEL OF APPROACHING MATURITY. IT HAS BEEN A YEAR OF ACCOMPLISH- 
MENT IN THE DEVELOPMENT OF THE ARBORETUM GROUNDS. THE MAINTENANCE STAFF 
IS DESERVING OF THE FULLEST PRAISE. 




ACACIA STEEDMANII . A NATIVE OF 
AUSTRALIA. BRIGHT YELLOW FLOWERS, 
SPATULA LIKE LEAVES AND PINK BARK, 



PLANT PROPAGATION 




NEW PROPAGATION "FOGGER". 

CERTAIN DIFFICULT TO 
PROPAGATE PLANT MATERIAL 
CAN BE ROOTED EASILY WHEN 
CUTTINGS ARE PLACED IN A 
VERY MOIST ATMOSPHERE. 
THE RECENTLY CONSTRUCTED 
OPEN-AIR "FOGGER" PRO- 
VIDES A FINE MIST LIKE 
SPRAY, BATHING THE ENTIRE 
CUTTING IN A FILM OF 
MOISTURE. 



FOGGER IN OPERATION, CUTTINGS BATHED IN A FINE MIST. 

POLYETHYLENE PLASTIC. 

THE USE OF POLYETHYLENE SHEETING TO COVER COLDFRAMES HAS BEEN INCREASED. 
MANY TYPES OF PLAWT CUTTINGS ARE NOW BEING ROOTED BY THIS TECHNIQUE. THIS 
SAME PLASTIC IN THE FORM OF BAGS HAS BEEN USED FOR STRATIFYING SEEDS, WHICH 
REQUIRE BOTH WARM AND COLD PERIODS FOR BREAKING DORMANCY, THUS HASTENING 
THEIR GERMINATION. 



OUR ORCHID COLLECTION. 

THE ARBORETUM NOW HAS ONE OF THE 
FINEST COLLECTIONS OF LADY SLIPPER 
ORCHIDS (CYPRIPEDIUM) . THE TOTAL 
COLLECTION OF ALL TYPES OF ORCHIDS 
NUMBERS APPROXIMATELY 2100 ACCESSIONS: 
REPRESENTATIVES OF THE GROUPS CYMBIDIUM 
AND CATTLEYA ARE AMONG THIS COLLECTION. 
A SPECIAL DISPLAY GREENHOUSE FOR THE 
ORCHIDS WILL SOON BE UNDER CONSTRUCTION, 
FINANCED BY PRIVATE FUNDS. 

REPRESENTATIVE BLOOMS OF: 

ROSY DAWN; C. MAUDIAE : C. 
COLORATUM : C. HELLASWEST; 
C. MILMOORE. 




A PLANT REGULATOR 



THE CHEMICAL, COLCHICINE, A PLANT BY-PRODUCT, IS OFTEN USED TO IN- 
CREASE THE NUMBER OF CHROMOSOMES (HERIDITARY CARRIERS) WITHIN PLANTS. 
THIS INCREASE IN THE NUMBER OF CHROMOSOMES IS TERMED POLYPLOIDY . THE 
RESULT OF SUCH A CHEMICAL TREATMENT IS SOMETIMES EXPRESSED IN LARGER 
PLANTS, AS LARGER LEAVES, LARGER FLOWERS OR OFTEN A COMBINATION OF THESE 
CHARACTERS. THE BLUE MARGUERITE DAISY, (FELICIA AMELLOIDES ) TREATED WITH 
COLCHICINE BY THE PLANT PROPAGATOR HAS BEEN INDUCED TO INCREASE ITS CHROMO- 
SOME NUMBER, PRODUCING FLOWERS NEARLY TWICE THE SIZE OF THE ORIGINAL PARENT 
FLOWER. A NATIVE OF SOUTH AFRICA, THIS NEW LARGER FLOWER DAISY HAS BEEN 
NAMED FELICIA 'SANTA ANITA 1 AND WILL SOON BE RELEASED FOR FURTHER PROPAGA- 
TION AND SALE TO THE GENERAL PUBLIC. 



a 



# 

& 



FELICIA AMEL0IDE3 . BLUE DAISY OR 
AGATHEA. LEFT, THE ORDINARY FLOWER 
SIZE. RIGHT, THE COLCHICINE TREATED, 
LARGER FLOWER « SANTA ANITA 1 . 



PLANT AND WEATHER RECORDS 



SURPLUS SEEDS AND PLANTS. 

AS DURING PREVIOUS YEARS, SURPLUS SEED AND PLANTS WERE DISTRIBUTED TO 
VARIOUS ARBORETA, BOTANICAL GARDENS, COUNTY, STATE AND GOVERNMENT INSTI- 
TUTIONS, NURSERIES AND INDIVIDUALS ON THE USUAL EXCHANGE BASIS. A GREAT 
MANY OF OUR SURPLUS PLANTS WERE GIVEN TO LOS ANGELES COUNTY INSTITUTIONS 
FOR LANDSCAPING PURPOSES, SUCH AS: 

LOS ANGELES COUNTY SHERIFF 1 S "WAYSIDE HONOR RANCHO" 

LOS ANGELES COUNTY "OAK GROVE BOYS CAMP" 

LOS ANGELES COUNTY "LONG BEACH HOSPITAL" 

LOS ANGELES COUNTY "MUSEUM" 

CITY OF LOS ANGELES PARKS DEPARTMENT 

CITY OF ARCADIA SCHOOLS 

EAST LOS ANGELES COLLEGE 

LONG BEACH STATE COLLEGE 

CITY OF PASADENA PARKS DEPARTMENT. 



WEATHER INFORMATION CONTINUES TO BE OF VALUABLE ASSISTANCE TO THE 
ARBORETUM IN REGARDS TO THE CARE OF PLANTS AND MOST SUITABLE SEASON FOR 
PLANTING OR CARE OF SOIL. 

IN ADDITION, THIS INFORMATION IS PROVING OF VALUE TO THE GENERAL 
PUBLIC IN THE AREA. FREQUENT TELEPHONE CALLS FROM INDIVIDUALS, CITY HALLS, 
AND NEWSPAPERS IN THE SAN GABRIEL VALLEY, ARE RECEIVED CONCERNING THE TEM- 
PERATURE, RAINFALL OR DEGREE OF DRYNESS. AT PRESENT THE DAILY HIGH AND 
LOW TEMPERATURE, EVAPORATION AND RAINFALL IS PUBLISHED TWICE WEEKLY IN THE 
LOCAL NEWSPAPER THE ARCADIA TRIBUNE. 



THE CITY OF ARCADIA WATER DEPARTMENT IS GIVEN A TELEPHONE REPORT OF 
DAILY MEASUREMENTS WHICH AIDS THAT DEPARTMENT IN DETERMINING ANTICIPATED 
WATER CONSUMPTION AND PUMP-TIME OPERATION. 

THESE SERVICES ARE AVAILABLE TO OTHER CITIES OR INDIVIDUALS UPON 



PL ANT RECORDS 




setos PI ANTED 11 / \\%<\ 

1164 corFssvcrS ^CSil 

£.63 3 

4,60S PLANTS 

lOVED TO GALLON 

cans 

II. 73S PLANTS MOVED 
TO PERMANENT P/ELDS 
LOCATIONS 




SEEL? 
AND 
PLANT 
EXCHANGE 



SEEDS 
#£cb 6S3PXG-S SENT *2/S P«<rS. 
RECD 379 PKG-S SENT £S6 PXGS. 



Foke/gh - RECD -?-2 SENT- O 

oo/vssr/c /?£cb /832 SENT-3863 






RA/NFALL /& 67 /NC//ES 
/NZ9DAYS /9SS-S6 



RECORD HI OH 
SEVEN DA\YS 

IOO TH/RTEEN &AYS ABOVE 
90 SEVENTY NINE ABOVE 



RECORD LOW 



9.59 /NCHES '** O/VE 
STORM 

/9SS-S6 



PLAN7 RECORDER TMCMH 
RECORD tNO IOSE OF 
WATER THROUGH 
EVAPORATION 




¥# 



THE ARBORETUM RESEARCH PROGRAM CONTINUES TO BE DIRECTED TOWARD FIND- 
ING PRACTICAL SOLUTIONS TO SOME OF THE HORTICULTURAL PROBLEMS FACING THE 
HOME OWNER IN SOUTHERN CALIFORNIA. 



A MIXTURE OF METHYLENE UREAS, IS A NEW FERTILIZER CONTAIN- 
SLOW TO DISSOLVE, THE NITROGEN IS RELEASED FOR PLANT 
USE OVER A LONG PERIOD. IT MAY BE POSSIBLE WITH THIS NEW FERTILIZER TO 
ADD PLANT FOOD TO A LAWN JUST ONCE A YEAR, OBTAINING A GREEN AND HEALTHY 
TURF FOR THE WHOLE YEAR. IN COMPARISON TESTS WITH OTHER COMMERCIAL 
FERTILIZERS, URAMITE MAINTAINED TURF GREENNESS LONGER THAN THE OTHER 




FE RTIL IZER TEST ON U-3 BERMUDA TURF. LEFT PANEL: URAMITE. 
CENTER PANEL: 8-8-4 NKP FORMULA. RIGHT PANEL: URAMITE. 
LEFT AND CENTER PANEL NITROGEN APPLIED AT 1 POUND PER 100 
SQ. FT. 



A NEW HERBICIDE WHICH HAS BEEN UNDER TEST AT THE ARBORETUM. 
EXPERIMENTAL WORK ELSEWHERE HAS SHOWN THIS COMPOUND TO COMPLETELY CONTROL 
CRABGRASS AND CHICKWEED IN TURF WITH NO INJURY TO ESTABLISHED TURF. THE 
RESULTS OF THE ARBORETUM TEST PLOTS CAN BE SEEN IN THE ACCOMPANYING PHOTO- 
GRAPH. CONTROL OF PURSLAND, A COMMON WEED, WAS CONSIDERED COMPLETE, HOW- 
EVER, NO CONTROL WAS GAINED OVER BARNYARD GRASS. WEED ERADICATION AT THE 
ARBORETUM CONTINUES TO BE A SERIOUS PROBLEM, ESPECIALLY NEAR GROWING PLANT 




NEBURON TEST. LEFT AND RIGHT TRIANGLES ARE UNTREATED CONTROL 
PLOTS SHOWING PURSLANE IN ABUNDANCE. TOP TRIANGLE TREATED WITH 
NEBURON AT THE RATE OF 16 POUNDS PER ACRE. BOTTOM TRIANGLE 
TREATED WITH NEBURON AT THE RATE OF 2 POUNDS PER ACRE. 



PHYGON XL: THE ARBORETUM LAGOON IS COVERED BY VARIOUS ALGAE DURING 
THE SUMMER MONTHS. A FUNGICIDAL CHEMICAL, PHYGON XL, HAS RECENTLY SHOWN 
PROPERTIES EFFECTIVE IN THE CONTROL OF CERTAIN ALGAE AND AQUATIC WEEDS. 
TESTS AT THE ARBORETUM WITH A SMALL CONCENTRATION OF THIS CHEMICAL RESULT- 
ED IN DEATH OF THE TREATED ALGAE. LARGE SCALE TRIALS, USING GREATER AMOUNTS 
OF PHYGON XL, CONTROLLED THE ALGAE OVER THE ENTIRE SURFACE OF THE LAGOON. 
A NEWS RELEASE ON THIS WORK RESULTED IN NUMEROUS INQUIRIES BY THE PUBLIC. 



CISTUS EXPERIMENTATION 

STARTED SEVERAL YEARS AGO, OUR INTEREST CONTINUES IN CISTUS OR ROCK 
ROSE AS AN EROSION CONTROL PLANT FOR SOUTHERN CALIFORNIA FOOTHILL PLANT- 
INGS. CERTAIN SPECIES EXHIBIT SOME RESISTANCE TO BURNING AND SEEDS GER- 
MINATE QUICKLY FOLLOWING A FIRE. THE ARBORETUM, IN COOPERATION WITH THE 
UNITED STATES FOREST SERVICE, HAS MANY TEST PLANTINGS OF CISTUS ON THE 
SLOPES OF THE NEARBY MOUNTAINS. RECENTLY, AN INHIBITOR TO GERMINATION, 
SOME TYPE OF CHEMICAL, HAS BEEN DISCOVERED ASSOCIATED WITH THE SEED OF 
CISTUS . THE IDENTIFICATION OF THE CHEMICAL NATURE OF THE INHIBITOR AND 
WAYS TO EFFECTIVELY ELIMINATE ITS ACTION IN THE FIELD ARE PROJECTS FOR 
FURTHER INVESTIGATIONS WITH THIS MOST INTERESTING PLANT. 




THE ROWS OF DARK PLANTS ARE VARIETIES OF CISTUS PLANTED 
AS 12" SEEDLINGS TWO YEARS AGO. SOME OF THE PLANTS ARE 
IN BLOOM. THIS IS A TEST FLANTING ON THE SOUTH SLOPE 
OF LANNON CANYON EARTH FLOOD CONTROL DAM, OPERATED BY 
THE LOS ANGELES COUNTY FLOOD CONTROL DISTRICT. 



AIR POLLUTION 



LOS ANGELES STATE & COUNTY ARBORETUM — OBSERVATION ON SEED AND 

NUMEROUS ORNAMENTALS. 
AIR POLLUTION CONTROL DISTRICT, COUNTY OF LOS ANGELES. 
UNIVERSITY OF CALIFORNIA, CITRUS EXPERIMENT STATION, RIVERSIDE. 



AIR POLLUTION CONTROL DISTRICT 
COUNTY OF LOS ANGELES 
RESEARCH DIVISION 



IN APRIL OF 1955, THE PLANT SECTION OF THE LOS ANGELES COUNTY AIR 
POLLUTION CONTROL DISTRICT WAS AUTHORIZED TO ERECT A GREENHOUSE ON THE 
GROUNDS OF THE LOS ANGELES STATE AM) COUNTY ARBORETUM. THE GREENHOUSE 
IS MECHANIZED SO THAT TEMPERATURE, HUMIDITY, NUTRITION, WATER AND LIGHT 
DO NOT DEVIATE FROM DAY TO DAY. THIS IS A RESEARCH AND AIR MONITORING 
ACTIVITY OF THE DISTRICT IN WHICH ANNUAL BLUEGRASS (POA ANNUA) AND OTHER 
PLANT MATERIALS ARE BEING GROWN FOR USE IN THE DETECTION OF POLLUTANTS 
IN BOTH THE FIELD AND IN THE LABORATORY. 




FAR LEFT: SMALL TEST BOX (SEE TEST). 

PROTECTED FROM THE INTENSE SUMMER SUN BY LATH AND 

CLOTH 



APPROXIMATELY 15 TEST BOXES ARE LOCATED AT WIDELY SEPARATED POINTS IN 
LOS ANGELES COUNTY AND ONE IN ORANGE COUNTY. ONE TEST BOX, LOCATED AT THE 
ARBORETUM, IS USED FOR ROUTINE MEASUREMENT . A SECOND IS FOR RESEARCH ON 
THE SUSCEPTIBILITY OF VARIOUS PLANTS. THE BOXES ARE SO DESIGNED THAT NOR- 
MAL ATMOSPHERIC CONDITIONS AND FILTERED AIR (POLLUTANTS REMDVED BY ACTIVATED 
CHARCOAL) CAN BE TESTED SIMULTANEOUSLY, USING PUNTS AS INDICATORS. SMOG 
PRODUCES LIGHT BROWN OR TAN COLORED BANDS ON GRASS, THE LENGTH OF WHICH IS 
AN INDICATION OF THE INTENSITY OF THE POLLUTANT. A DAILY PICTURE OF THE 
AIR POLLUTION IN DIFFERENT PARTS OF THE COUNTY IS OBTAINED. THIS IS 
STUDIED IN CONNECTION WITH CHEMICAL ANALYSES OF THE AIR AND METEROROLOGICAL 
CONDITIONS. 



THE LOCATION OF THIS PROJECT HAS RESULTED IN SUBSTANTIAL SAVINGS IN 
TIME AND MONEY. MANY ITEKS WOULD OTHERWISE HAVE TO BE BOUGHT IN DUPLICATE, 
E.G., HOSES, WEEDERS, SPRAY GUNS, MECHANICAL TOOLS, ETC. 

THE ARBORETUM STAFF, WHICH IS ON DUTY OVER WEEKENDS, HAS PROVIDED 
VALUED HELP BY CHANGING TEST PLANTS AND CHECKING THE GREENHOUSE CONTROLS 
ON WEEKENDS. THIS TAKES ONLY A FEW MINUTES 1 TIME, BUT THIS TASK REQUIRES 
PEOPLE WITH JUDGMENT AND TECHNICAL KNOWLEDGE. 

THE GREAT NUMBER OF SPECIES OF PLANTS GROWN IN THE ARBORETUM'S OWN 
GREENHOUSES HAS PROVIDED AN OPPORTUNITY FOR THE AIR POLLUTION CONTROL DIS- 
TRICT PEOPLE TO OBSERVE THEIR RESISTANCE OR SUSCEPTIBILITY TO SMOG. THE 
PURSUANCE OF AIR POLLUTION STUDIES BY THE RIVERSIDE CITRUS EXPERIMENT 
STATION'S GROUP ON NEIGHBORING GROUND, HAS PROVIDED BOTH GROUPS WITH AN 
OPPORTUNITY TO EXCHANGE INFORMATION AND EXPERIENCE. 



UNIVERSITY OF CALIFORNIA, 
CITRUS EXPERIMENT STATION, 
RIVERSIDE, CALIFORNIA. 

THIS IS THE SECOND RESEARCH AGENCY CONDUCTING STUDIES AT THE ARBORETUM 
ON THE EFFECT OF AIR POLLUTION (SMDG) ON PLANTS. UNDER THE DIRECTION OF DR. 
0. C. TAYLOR, DEPARTMENT OF HORTICULTURE, THEY ARE STUDYING CITRUS, AVOCADO, 
MACADAMIA, ALL TREE CROPS; AND BEANS, A FIELD CROP. 

RESEARCH WAS INITIATED HERE IN THE FALL OF 1956 AND AS A RESULT AN 
EFFECT OF NATURAL AIR POLLUTANTS IN LOS ANGELES COUNTY WAS DEMONSTRATED 
FOR THE FIRST TIME ON CITRUS. THE DAMAGE SYMPTOMS ON GRAPEFRUIT TREES 
WERE AN INCREASED AMDUNT CF LEAF DROP AS WELL AS A BRONZING OF THE FULLY 
EXPANDED LEAVES REMAINING ON THE TREE. 

ON THE BASIS OF THE SUCCESS OF THE FIRST TRIALS, THIS WORK HAS BEEN 
EXPANDED AND TWO LARGE AIR TIGHT GLASSHOUSE TYPE ENCLOSURES, AS SEEN IN 
THE ILLUSTRATION, HAVE BEEN CONSTRUCTED AT THE ARBORETUM BY THE EXPERIMENT 



STATION. BOTH HOUSES HAVE FORCED AIR VENTILATION BUT IN ONE THE SMOG IS 
REMOVED BI CARBON FILTERS WHILE THE OTHER RECEIVES NON-FILTERED AIR. 




THE PLANTS MENTIONED ABOVE ARE NOW BEING STUDIED IN THESE FACILITIES 
NOT ONLY TO LEARN OF ALL POSSIBLE DETRIMENTAL EFFECTS OF SMOG ON THEIR 
GROWTH AND PRODUCTION, BUT ALSO HOW TO MINIMIZE THESE EFFECTS. THIS STUDY 
IS OF DIRECT VALUE TO THE AGRICULTURE OF LOS ANGELES COUNTY. 



AN IMPORTANT OBJECTIVE OF THE ARBORETUM IS TO INSTRUCT ITS VISITORS, 
NOT ONLY IN THE NEWNESS OR UNIQUE QUALITY OF GROWING PLANT SPECIMENS, BUT 
TO PROVIDE INSTRUCTION IN BOTANY, HORTICULTURE AND NATURAL HISTORY FOR AN 
APPRECIATION AND UNDERSTANDING OF THE PLANT WORLD. 

THIS SPRING, THE ARBORETUM BEGAN ITS EDUCATION PROGRAM ON A PRELIMI- 
NARY BASIS IN OFFERING FOUR CLASSES. THE FOLLOWING COURSES ANSWERED THE 
PUBLIC NEED AS INDICATED BY THE FREQUENCY OF REQUESTS: 

A. TREE BADGE GIRL SCOUT TROOPS WERE GIVEN A SERIES OF TEN 

LECTURES AND DEMONSTRATIONS IN IDENTIFICATION, 
PROPAGATION AND CONSERVATIONS OF TREES. THIS 
CLASS TERMINATED IN AN ARBOR DAY PROGRAM CON- 
DUCTED AT THE ARBORETUM AND THE SIX ELEMENTARY 
SCHOOLS OF ARCADIA BY THE GIRL SCOUTS. 

B. LEADERS 1 COURSE MEETING WEEKLY FROM 7-9 P.M. FOR TEN SESSIONS. 

PLANNED FOR ADULT LEADERS ACTIVE IN BOY AND GIRL 
SCOUTS AND OTHER YOUTH GROUP PROGRAMS. IN- 
STRUCTION AND DEMONSTRATION INCLUDED BOTANY, EN- 
TOMOLOGY, ORINITHOLOGY AND NATURE STUDY. 

C. PLANT LORE CLUB A GROUP OF SPECIALLY INTERESTED 7TH AND 8TH GRADE 

BOYS AND GIRLS. A NATURE STUDY COURSE CENTERED 
AROUND PLANTS. 

D. BOTANICAL SKETCHING PENCIL SKETCHING TO LEARN FORM, SHAPE AND PER- 

SPECTIVE USING LIVING PLANT MATERIAL AS MODELS. 
A BRIEF BOTANICAL LECTURE BEGAN EACH CUSS 
SESSION. 

THE SUMMER SESSIONS ALSO CENTERED AROUND FOUR CLASSES. LARGER CLASS 
SIZES WERE ATTEMPTED AND MORE PUBLIC NOTICE WAS GIVEN CONCERNING THE 
COURSES BEING OFFERED: 

A. NATURE LORE: CHILDREN 9-11 TEARS OLD. 

B. TREE IDENTIFICATION: BOY AND GIRL SCOUTS AND ADULTS. 

C. CULTIVATION AND USE OF HERBS: ADULTS. HERB SOCIETY CONDUCTED. 

D. BOTANICAL SKETCHING: A REPEAT CLASS OF THE TYPE GIVEN IN 

THE SPRING. 

E. BIRD WALKS: 1ST AND 3RD SUNDAYS - 8:00 - 10:00 A.M. 

THESE EARLY MORNING TRIPS WERE ATTENDED 
BY CHILDREN AND ADULTS ALIKE. 

ALL CLASSES WERE CONDUCTED OUTDOORS, MAKING LECTURE MATERIALS READILY 
ACCESSABLE TO THE STUDENTS AND AT THE SAME TIME STIMULATING CLASS INTEREST 
IN A WAY NEVER APPROACHED IN THE USUAL CLASSROOM COURSES. 



CUSS ACTIVITIES 




GIRL SCOUTS PLANTING SEEDS. 
ONE PHASE IN THE PURSUIT OF 
THEIR TREE MERIT BADGE. 






WATCHING BIRDS WORK. 



BOTANICAL SKETCHERS 
MEASURE FOR PERSPECTIVE 




m 




*& :'- 




AFTER A FORMAL CLASS LECTURE ON HERBS, 

THEIR USES, HISTORY OR LORE; THE 

CLASS MEMBERS WALK TO THE HERB ^ 

GARDEN TO SEE LIVING HERB Q ^o 



V<* 



8 v 




THE ARBORETUM LIBRARY 

A LIBRARY IS THE HEART OF ANY INSTITUTION ENGAGED IN RESEARCH AND 
EDUCATION. IT HOLDS THE KNOWLEDGE GAINED FROM PAST ENDEAVORS AND IS THE 
SOURCE OF IDEAS FOR NEW WORK; HOWEVER, ITS VALUE LOCALLY IS MEASURED BY 
ITS DAILY ACTIVITIES AND OVER-ALL YEARLY GROWTH. 

A PRIMARY GAIN THIS YEAR WAS THE APPOINTMENT OF A FULL TIME LIBRARIAN. 

FOR THE STAFF, THIS MEANT MORE NEARLY KEEPING ABREAST 
WITH THE CURRENT LITERATURE WHETHER CONCERNED WITH 
DEVELOPING AN EDUCATIONAL PROGRAM, PUNT IDENTIFICATION, 
COLLECTING NEW PLANTS, PLANT PROPAGATION OR PLANT CARE. 

FOR PEOPLE OUTSIDE THE STAFF, SUCH USE OF THE LIBRARY 
WAS NOTICEABLY GREATER, THIS MEANT DATA FOR PLANT RE- 
SEARCH, BOTANY, HORTICULTURE, LOCAL HISTORY AND LAND- 
SCAPING BECAME MORE READILY AVAILABLE. 

FOR THE BENEFIT OF ALL, THIS MADE POSSIBLE THE CATA- 
LOGING OF ALL CURRENT ACQUISITIONS, AS WELL AS COMPLET- 
ING THE CATALOGING OF THE SECTIONS: HORTICULTURE . 
ORNAMENTAL PLANTS . FOOD FLAM'S AND CALIFCRNIANA . THIS 
UTTER ACTIVITY REPRESENTS HANDLING <U3 BOOKS AND 1,199 
PAMPHLETS. 

THE LIBRARIAN'S RESPONSIBILITIES WERE INCREASED BY THE FOLLOWING: 

PERIODICALS: SUBSCRIPTION, EXCHANGE, DONATIONS 202 

BOOKS: PURCHASES, DONATIONS 252 



ON LOAN: 



BOOKS, NON-CURRENT PERIODICALS, REPRINTS 6tf 



INCLUDED IN THE LAST 
DIVISION WERE THREE OLD 
REGISTERS FROM A HOTEL 
WHICH WAS A SAN GABRIEL 
VALLEY LANDMARK. A 
COLLECTION OF HERB BOOKS 
WAS ALSO OF INTEREST. THE 
DONOR GAVE THE BOOKS 
BECAUSE OF THE GREAT IN- 
TEREST IN HERBS AROUSED BY 
OUR NEWEST PLANT ATTRACTION 

THE HERB GARDEN AT THE 

FOOT OF TALLAC KNOLL. 





SPECIAL EVENTS 



THE ARBORETUM* S CHRISTMAS GIFT: 
THE BRIGHTLY LIGHTED STAR 

ABOVE THIS GROUP OF 
PALMS DURING THE CHRISTMAS 
SEASON. 



CAVALCADE OF HEALTH AND MEDICAL PROGRESS, SPONSORED BY THE LOS ANGELES 
COUNTY MEDICAL ASSOCIATION, JANUARY 6TH THROUGH JANUARY 15, 1956. A PORTION 
OF THE ARBORETUM'S BOOTH FEATURING EXHIBITS TITLED: SOILLESS PLANT CULTURE- 
SMOG SYMPTOMS OF PLANTS; DRUGS FROM PLANTS; GARDENING FOR HEALTH. 



m 





INFORMATION ABOUT THE ARBORETUM 
DISPUTED AT DESCANSO GARDENS 
DURING THEIR ANNUAL CAMELLIA 
FESTIVAL, FEBRUARY 25 - MARCH 11, 1956. 



ARBOR DAY, MARCH 7, 1956. 

MEMBERS OF THE LOS ANGELES 
GARDEN CLUB, SOUTHERN CALI- 
FORNIA UNIT OF THE HERB 
SOCIETY OF AMERICA, THE 
CALIFORNIA ARBORETUM FOUN- 
DATION, THE ARCADIA SCHOOL 
DISTRICT, THE ARBORETUM 
STAFF AND VISITORS. THIS 
PROGRAM WAS PLANNED AND 
CONDUCTED BY GIRL SCOUT 
TROUP #62 OF ARCADIA, AT THE 
CONCLUSION OF THEIR TREE 



THE INTERNATIONAL FLOWER SHOW; MARCH 17 THROUGH 




^&SP- m^tw 



BY THE ARBORETUM. THE ARBORETUM, 
IN COOPERATION WITH PIERCE JUNIOR 
COLLEGE, ERECTED AND MAINTAINED THE 
LANDSCAPE SECTIONS OF THE EXHIBIT. 
SEVERAL ARBORETUM STAFF MEMBERS 
SERVED IN THE INFORMATION BOOTH OF 
THIS EXHIBIT. THE TROPHY SHOWN IN 
THE PICTURE WAS 'AWARDED THE ARBOR- 
ETUM FOR "MOST OUTSTANDING EXHIBIT, 
EDUCATIONAL DIVISION". 



THE BIG DITCH 

CONSTRUCTION ON ONE OF THE FEW REMAIN- 
ING SECTIONS OF THE ARCADIA WASH FLOOD 
CONTROL CHANNEL IS PROGRESSING THROUGH 
THE SOUTH AMERICAN AND AUSTRALIAN 
SECTIONS OF THE ARBORETUM. THIS CHANNEL 
PROVIDES PROTECTION FOR THE ARBORETUM 
AND RESIDENTS OF THE SAN GABRIEL VALLEY 
AGAINST DAMAGING FLOOD WATERS, DIRT, AND 




;: 



4 



MEETING OF THE ATHLETIC 
AND RECREATIONAL TURF- 
GRASS ASSOCIATION. 

PRESIDENT BOB BERLIN 
ADDRESSING THE MEMBERS 
FOLLOWING AN INSPECTION 
TOUR OF THE ARBORETUM 
GROUNDS AND TURFGRASS 
PLOTS. 



A VISITOR 

FORMER MAYOR OF LOS ANGELES, 
FLETCHER BOWRON, INSPECTS 
THE BALDWIN TALLY-HO. MR. 
BOWRON RECALLED VISITING 
THE FABULOUS RANCHO SANTA 
ANITA AS A VERY YOUNG BOY. 




PUBLIC RELATIONS 




695 NEWSPAPER RELEASES 
CARRIED THE STORY OF 
THE ARBORETUM AND ITS 
DEVELOPMENT. 



WE WERE INVITED TO PARTICIPATE IN 12 RADIO BROADCASTS. 

SEVERAL TV NETWORKS COVERED VARIOUS PHASES OF THE ARBORETUM PROJECTS. 
NOTABLE AMONG THESE WERE A SERIES OF PROGRAMS BY JOE LITTLEFIELD ON HIS 
"GARDEN CHATS". 

RESULTS OF ARBORETUM PLANT INTRODUCTIONS AND HORTICULTURAL RESEARCH 
WERE PUBLISHED BY STAFF MEMBERS IN LASCA LEAVES AND IN NATIONAL PERIODICALS 





A RIVEDERCI 




ALOHA 


AUF WIEDERSEHEN 




SAYNARA 


HASTA LA VISTA 




DOS VIDAYNA 


AU REVOIR 


GOOD-BY 


KALI NEETA 



fL 

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